Matter and Energy

A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. The first indication that a chemical change was taking place could be observed when?

• The crystals were added to the liquid.

• The crystals dissolved in the liquid.

• The temperature of the liquid increased.

• The color of the mixture changed.

Tags

NGSS.MS-PS1-2

The provided table shows the properties of four different sample materials. A student has a substance with a density of 1.28 g/cm3. Which sample does the student have?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

Tags

NGSS.MS-PS1-2

Scientists test for the hardness of a mineral by doing which of the following?

• Measuring the mass of the mineral, and comparing it against other minerals.

• Observing how light reflects off the mineral and how the mineral look as a result.

• Observing the color of a mineral and comparing it against other minerals.

• Scratching the mineral against other substances of known hardness.

How can you remove energy from matter?

• By increasing its volume

• By lowering its temperature

• By increasing its pressure

• By boiling it

Tags

NGSS.MS-PS1-4

Temperature is measured in ______.

• Kelvin

• Newtons

• Watts

• Joules

Tags

NGSS.MS-PS3-4

Which is most likely a major concern associated with burning fossil fuels?

• Burning fossil fuels can pollute the oceans.

• Burning fossil fuels can remove harmful chemicals from precipitation.

• Burning fossil fuels can remove carbon dioxide from the atmosphere.

• Burning fossil fuels can produce smog, which can cause respiratory illnesses.

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

NGSS.MS-ESS3-5

Students are investigating changes from potential to kinetic energy by rolling a marble down a ramp made by propping up a plastic ruler on a book and letting it roll down. Which of the following will change the potential energy the marble starts with?

• Switching the plastic ruler with a wooden one

• Adding more books and increasing the height of the ruler

• Pushing the marble down the ramp

• Replace the marble with a rock

Tags

NGSS.MS-PS3-2

Which of the following three elements are most abundant in the plants and animals that make up the biosphere?

• Sulfur, oxygen, and hydrogen

• Nitrogen, silicon, and oxygen

• Phosphorous, oxygen, and iron

• Oxygen, carbon, and hydrogen

When plants and animals interact with the atmosphere, they are exchanging which elements abundant in both the atmosphere and living things?

• Nitrogen and oxygen

• Hydrogen and calcium

• Phosphorus and carbon

• Hydrogen and oxygen

When two substances are mixed, they might form a new substance. Which of the following would indicate that a new substance has been formed?

• The temperature of the mixture decreases

• The volume of the mixture increases

• The mass of the mixture increases

• One of the substances dissolves

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5